Classification
320 - Political science
700 - The arts; fine & decorative arts
900 - History & geography
330 - Economics
252
300 - Social sciences
59
600 - Technology
55
363 - Other social problems & services
51
333 - Economics of land & energy
49
340 - Law
44
000 - Computer science, information & general works
43
140 - Specific philosophical schools
41
620 - Engineering & allied operations
39
380 - Commerce, communications & transportation
37
576 - Genetics & evolution
34
100 - Philosophy & psychology
30
720 - Architecture
29
370 - Education
28
200 - Religion
26
400 - Language
26
800 - Literature & rhetoric
25
301 - Sociology & anthropology
19
551 - Geology, hydrology & meteorology
18
780 - Music
17
581 - Specific topics in natural history
15
610 - Medicine & health
15
630 - Agriculture & related technologies
15
170 - Ethics
14
410 - Linguistics
13
304 - Factors affecting social behavior
11
770 - Photography, photographs & computer art
9
580 - Plants (Botany)
7
658 - General management
6
297 - Islam, Babism & Bahai Faith
5
500 - Natural sciences & mathematics
5
791 - Public performances
4
943 - Central Europe; Germany
4
360 - Social problems & services; associations
3
414 - Phonology & phonetics
3
120 - Epistemology, causation & humankind
2
160 - Logic
2
322 - Relation of state to organized groups
2
324 - The political process
2
361 - Social problems & social welfare in general
2
398 - Folklore
2
530 - Physics
2
016 - Bibliographies of works on specific subjects
1
193 - Philosophy of Germany & Austria
1
306 - Culture & institutions
1
338 - Production
1
382 - International commerce
1
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